@SET GACUTIL="C:\Program Files\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools\gacutil.exe"
Echo Install the dll into GAC
%GACUTIL% -if "C:\Program Files\Microsoft Silverlight\4.0.60531.0\System.Core.dll"
%GACUTIL% -if "C:\Program Files\Microsoft Silverlight\4.0.60531.0\System.Windows.dll"
%GACUTIL% -if "C:\Program Files\Microsoft Silverlight\4.0.60531.0\System.Xml.dll"